diff --git a/README b/README
index 5d472ecc85..b89768f179 100644
--- a/README
+++ b/README
@@ -1240,9 +1240,6 @@ typically in board_init_f() and board_init_r().
 Configuration Settings:
 -----------------------
 
-- MEM_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit.
-		Optionally it can be defined to support 64-bit memory commands.
-
 - CONFIG_SYS_LONGHELP: Defined when you want long help messages included;
 		undefine this when you're short of memory.